9920957 has 2 divisors, whose sum is σ = 9920958. Its totient is φ = 9920956.

The previous prime is 9920951. The next prime is 9920993. The reversal of 9920957 is 7590299.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8826841 + 1094116 = 2971^2 + 1046^2 .

It is a cyclic number.

It is not a de Polignac number, because 9920957 - 2¹⁰ = 9919933 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9920951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4960478 + 4960479.

It is an arithmetic number, because the mean of its divisors is an integer number (4960479).

Almost surely, 2^9920957 is an apocalyptic number.

It is an amenable number.

9920957 is a deficient number, since it is larger than the sum of its proper divisors (1).

9920957 is an equidigital number, since it uses as much as digits as its factorization.

9920957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51030, while the sum is 41.

The square root of 9920957 is about 3149.7550698427. The cubic root of 9920957 is about 214.8743235225.

The spelling of 9920957 in words is "nine million, nine hundred twenty thousand, nine hundred fifty-seven".